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单选题 导致列管式换热器传热效率下降的原因可能是( )
学科：化工传热与控制技术
时间：2024-11-07 08:00:10
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题目1单选题
翅片管换热器的翅片应安装在( )A. α小的一侧B. α大的一侧C. 管内D. 管外
题目2单选题
对管束和壳体温差不大,壳程物料较干净的场合可选( )换热器A. 浮头式B. 固定管板式C. U型管式D. 套管式
题目3单选题
当壳体和管速之间温度大于50℃时,考虑热补偿,列管换热器应选用( )A. 固定管板式B. 浮头式C. 套管式
题目4单选题
导致列管式换热器传热效率下降的原因可能是( )A. 列管结垢或堵塞B. 不凝气或冷凝液增多C. 道或阀门堵塞D. 以上三种情况
题目5单选题
对于加热器,热流体应该走( )A. 管程B. 壳程
题目6单选题
1 In most countries, the bond market sector with the smallest amount of bonds outstanding is most likely theA. A government sectorB. B financial corporate sectorC. C non- financial corporate sector
题目7单选题
2 The distinction between investment grade debt and non- investment grade debt is best described by differences inA. A tax statusB. B credit qualityC. C maturity dates
题目8单选题
3 A bond issued internationally, outside the jurisdiction of the country in whose currency the bond is denominated, is best described as aA. A EurobondB. B foreign bondC. C municipal bond
题目9单选题
4 When classified by type of issuer, asset- backed securities are part of theA. A corporate sectorB. B structured finance sectorC. C government and government- related sector
题目10单选题
5 Compared with developed markets bonds, emerging markets bonds most likelyA. A offer lower yieldsB. B exhibit higher riskC. C benefit from lower growth prospects
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